Combined universal square and protractor



Oct. 14, 1930. c. E. SULLENBERGER 1,778,405

COMBINED UNIVERSAL SQUARE AD PROTRACTOR Filed Oct. 9, 1928 lpf'lmd.

lllllllllll Patented Oct. 14, 1930 PATENT OFFICE CHARLES E. SU'LLENBERGILR7 0F PIQUA, OHIO COMBINED UNIVERSAL SQUARE AND PROTRACTOR Application led October 9, 1928. Serial No'. 311,388.

This invention relates to a combined universal square and protractor. This device is a portable hand-tool that can be used by pattern makers, machinists, carpenters, or, in

fact, by any mechanic.

The object of my invention is to produce a hand-tool which can be used where an obstacle prevents the use of an ordinary square or protractor. The head of the device, carrying the ruler, may be raised or lowered to any required height, the face or outer edge of the head always remaining at right angles with the face or lower edge of the supporting base.

Another object of the invention is the construction of a device, the parts of which can be `easily adjusted, whereby the user will be enabled to locate or determine any desired angle on almost any shaped piece of work.

Vith the foregoing and other objects in View, my invention comprises certain novel constructions, combinations and arrangements of parts as will be hereinafter fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claim.

In the drawings:

Figure 1 is a view' in side elevation of a device constructed in accordance with the present invention. Y

Figure 2 is a fragmentary view of the device, showing, in elevation, the opposite side of the head to that shown in Figure 1.

Figure 3 is a sectional view taken on line 3-3, Figure 1, and looking in the direction of the arrows.

Figure 4 is a sectional view taken on line 44, Figure 2, and looking in the direction of the arrows.

Figure 5 is a fragmentary perspective view of the base of the device.

Figure 6 is a fragmentary view, partly in section, of the head of the device.

Referring to the drawings by numerals, 1 designates the base which is provided in its upper edge with a longitudinally extending groove 2; in this groove 2 are the lower ends of links 3, 3; these links 3 are pivotally mounted, at their lower ends, upon bolts 4. Butterfly nuts 5 are on bolts 4, whereby the links 3 can be tightened in an adjusted position.

The head 6 is relongated in shape, with a groove 7 6) formedin its lower edge,y into which extends the upper ends of the links 3. These upper ends are pivotally mounted on screws 8. v

In'the elongated head 6 is arotatable dial 9. This dial is provided with lan annular flange 10 engaging shoulder 11 (Fig. The dial 9 is provided with a gage glass or level 12. Tohold the dial 9in its seated osition within the head 6, I provide two loc lng devices 13. Each locking device 13 comprises a head 14 with a threaded shank 15; the shank 15 is threaded into the head, as clearly shown in Figure 4l. On shank 15 and pressing.v against the dial 9 arewashers 16. Around shank 15 and between the washers 16 yand the headll isa 'coil spring 17; this Spring 17 causes the washers to tightly engage the dial, and when the head and shank are turned tightly upon the head, the dial 9 will be prevented from rotating.

The dial 9 at one side is provided with an outwardly bulged portion 18, in which is formed a ruler-receiving groove 19. A. ruler 20 is placed in groove 19 with the lug 21 on bolt 22 extending into the slot 23 of the ruler 20. A nut 24: is threaded upon the outer end of bolt 22 and between the nut and bulged portion 18 is placed coil spring 25. This spring gives a slight yielding action, but the ruler can be locked in an adjusted position upon the dial by screwing nut 24 tightly in position. Therefore, it will bc seen that I have provi-ded a retaining and locking device for ruler 20 upon the dial 9, whereby the ruler is reta-ined on the dial and also is locked against sliding thereon, and I have also provided. in the locking devices 13, means for locking the dial against rotary movement upon the head 6.

` The outer edge of the head 6 is shown in Figure 1 against the work 26; this outer edge is always at right angles to the lower or bottom edge of base 1. The screws 8 are the attaching means for the upper ends of the links 3, whereas the bolts 4 and butterfly nuts 5 are not only attaching means but means for holding the links and the head in an adjusted position, since by loosening the butterily nuts 5, the head can be raised or lowered as the operator desires, and then by tightening said butterfly nuts, the head will be retained in the adjusted position. My device can be used advantageously in lining shafts where ybevelled gears are used, or in setting-up work,

or checking work on planing yInachinesror 'lo shapers.

While I have described the preferred ernbodirnent ofniy invention and illustratedin i Y the same in the accompanying drawings, certain minor changesr or alterations may ap-v 15 pear to one skilled in the art to which this invention'relat'es during the extensive manufacture ofthe saine, and I, therefore, reserve theright to make such changes or alterations c. asshall fairly fall within the scope of the 2o appended claim. 'i

VVhatIclain'nis;`"V Y In a device of the. class described, the com-l Y bination of anj'elongated, horizontal .base provided with a longitudinally extending 25v `groovev in itsA upper edge, bolts extending through said base andgroove, elongated links withftheir lower endsin said lgroove and piv-v oted on said bolts, nuts on said bolts lfor securing said elongated linksY in an adjusted` 3o position on said base. a head on the upper end of said elongated links, and a ruler-carrying dialon said head. 1 In testimony whereof I hereunto aiiix my f Signature# 35 v(IHARLIS E. "SULLENBERGER 

